Association between Chronic Obsructive Pulmonary Disease and Dietary Inflammatory Index in Korean Men Over 40s-based on the 2016-2019 Korea National Health and Nutrition Examination Survey

Abstract

Background: This study aimed to explore the association between chronic obsructive pulmonary disease (COPD) and dietary inflammatory index (DII) in Korean male adults.Methods: The subjects consisted of 4,267 Korean male adults aged over 40 years in the National Health and Nutrition Examination Survey from 2016-2019. Subjects were categorized into four groups based on quartiles of dietary inflammatory index score.Results: Individuals with high DII score had poor health habits such as drinking, smoking, activity limitations. The intake of anti-inflammatory items except monounsaturated fatty acid decreased as the DII item score increased. The higher the score of DII, the lower the forced expiratory volumn in 1 sec (FEV₁), forced vital capacity (FVC), FEV₁/FVC which are lung function measures. The prevalence of COPD increased in the highest quartile of the DII score.Conclusions: It was found that dietary inflammatory index was significantly associated with lung function and COPD. The promotion of a healthy diet with anti-inflammatory properties may help to prevent COPD in male adults.